Speaker box



FIG. 1 is a bottom, front, left side perspective view of a speaker box embodying a novel design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown are included for the purpose of illustrating portions of the speaker box that form no part of the claimed design. 

CLAIM The ornamental design for a speaker box, as shown and described. 